Pentacene
并五苯
🗣️ 情景例句
Of course not.
当然不是
Punctuality is the soul of business.
严守时间是办事情的重要原则。
Before you leave the lab, make sure the electricity is turned off and the windows are shut.
你们离开实验室前，务必要关上电源，关好窗户。